Question

Which chemical equation below is balanced to follow the Law of Conservation of Mass?

2 H2 + Cl2 > 3 HCl
2 H2 + 2Cl2 > 2 HCl
H2 + Cl2 > 2HCl
H2 + Cl2 > HCl

Answer 1

H₂ + Cl₂ → 2HCl

Step-by-step explanation:

The equation that is balanced and follows the law of conservation of mass is:

H₂ + Cl₂ → 2HCl

Based on the law of conservation of mass "in a chemical reaction, matter is neither created nor destroyed but they combine with one another".

It suggests that the number of species on both sides of the expression must be the same.

For the given reaction:

H₂ + Cl₂ → 2HCl

Reactant side Product side

H 2 2

Cl 2 2